KYC-free prepaid credit cards can help a lot, e.g. if a brick-and-mortar store or public transit machine doesn't accept cash or if an online store or app (e.g. taxi, delivery) doesn't accept crypto or gift cards. (In many countries, it isn't possible to buy Visa/MasterCard gift cards for cash in gas stations anymore.)
Sadly you can't convince everyone to accept Bitcoin and there may be no alternative stores/apps that sell what you need, so it's great for financial inclusion to have a KYC-free option to access credit card payments.
but maaan... "is not FOSS" :) why are you using non FOSS?